Slitting & Cut To Length Combined Line

Shijiazhuang Faith Machinery Co.,Ltd integrates slitting and cut‑to‑length (CTL) operations into a cohesive production line, delivering efficiency gains for customers who require both slit coils and flat sheets from the same coil source. The combined line eliminates costly coil handling steps and reduces tooling changeover time. This article outlines the combined line’s architecture, performance enhancements, product versatility, and service offerings.

1. Combined Line Architecture

1. Decoiling and Leveling

• A shared decoiler feeds both slitting and CTL modules via a material accumulator loop.

• A high‑capacity leveler stand corrects strip flatness for both downstream processes.

2. Slitting Section

• Rotary knives shear strip to specified widths, with knife barrel positioning via servo drives for millisecond‑level accuracy.

3. Cut‑to‑Length Section

• Strip advances into a flying shear or guillotine shear, synchronized to line speed for burr‑free cuts ranging from 500 mm to 8,000 mm in length.

• Sheet separation conveyors and stacking arms handle variable sheet sizes and minimize manual intervention.

4. Recoiling (Optional)

• When coils are required, a downstream recoiler recoils any slit strips not directed to the CTL section.

2. Performance and Throughput

• Recipe‑Based Switching: PLC recipes define slitting widths, cut lengths, and line speeds, allowing selection between coil and sheet output modes in under ten minutes.

• High‑Speed Operation: Flying shear capability up to 120 m/min supports high‑volume CTL production, while slitting sections maintain up to 80 m/min throughput for narrow widths.

• Minimal Material Waste: Precision leveling and slitting reduce edge burrs, minimizing scrap and improving yield for both coils and sheets.

3. Material and Application Flexibility

• Strip Specifications: Suitable for steel strip thicknesses from 0.3 mm to 4 mm and widths up to 2,000 mm, accommodating common grades such as mild steel, galvannealed, and pre‑painted substrates.

• Sheet End‑Use: Automotive inner panels, appliance housings, electrical enclosures, and construction panels benefit from combined output capability.

• Slit Coil Markets: Service centers and component fabricators utilize slit coils for bending, stamping, and roll forming applications.

4. Automation and Integration

• Centralized HMI: Single touchscreen controls both slitting and CTL modules, displaying live metrics—slit width, cut count, line speed, and coil build diameter.

• ERP Linkage: Automated reporting to material resource systems updates inventory in real time for both coil and sheet stock.

• Safety Interlocks: Light curtains and safety mats protect operators at both slitting and shearing zones, while emergency stops at each module halt the entire line.

5. After‑Sales Support

• Commissioning Plan: Coordinated on‑site startup ensures smooth transition between product modes and assists with initial production runs.

• Operator Certification: Training covers changeover procedures, PLC fault resolution, and maintenance of blade edges and shear knife alignment.

• Maintenance Contracts: Optional service agreements include annual inspections of shear drives, back‑tension rollers, and hydraulics, extending component life and safeguarding uptime.